OK, so here's another "weird" thang. The headphone jack on the SL6000 is a 2.5mm, not a 3.55mm which is the internationally recognized freakin' standard. I guess you could pound it in with a ball peen hammer, which I'm tempted to do, but there is an adapter available. Apparently the Treo 600 uses the same f****d up size, so here's a link to the stupid thing. Aaaarrrggghhhh !